Triumph Tiger Explorer XR 2017 Service Manual page 240

Tiger Explorer XR Series
injection is adjusted to suit the prevailing conditions.
Manifold Absolute Pressure (MAP) sensor - situated to the left side of the airbox, connected to each of the
three throttle bodies by equal length tubes. The MAP sensor provides information to the engine ECM which is
used at shallow throttle angles (very small throttle openings) to provide accurate engine load indications to the
engine ECM. This degree of engine load accuracy allows the engine ECM to make very small adjustments to
fuel and ignition which would otherwise not be possible from throttle angle data alone.
Clutch switch - situated on the clutch lever. The clutch must be pulled in for the starter motor to operate. With
the cruise control on and active, the operation of the clutch will cancel cruise control.
Crankshaft position sensor - situated in the crankcase, near the flywheel cover. The crankshaft position
sensor detects movement of a toothed wheel attached to the flywheel rotor. The toothed wheel gives a reference
point from which the actual crankshaft position is calculated. The crankshaft position sensor information is used
by the engine ECM to determine engine speed and crankshaft position in relation to the point where fuel is
injected and ignition of the fuel occurs.
Engine coolant temperature sensor - situated at the rear of the cylinder head, on the left hand side. Coolant
temperature information, received by the engine ECM, is used to optimise fuelling at all engine temperatures
and to calculate hot and cold start fueling requirements.
Throttle position sensors 1 and 2 - the two sensors are located in the same housing which is situated at the
left end of the throttle body. Used to relay throttle position information back to the engine ECM.
Oxygen sensor - situated in the exhaust header system upstream of the catalyst. The oxygen sensor constantly
feeds information to the engine ECM on the content of the exhaust gases. Based on this information,
adjustments to air/fuel ratio are made.
Side stand switch - situated at the top of the side stand leg. If the side stand is in the down position, the engine
will not run unless the transmission is in neutral.
Inertial Measurement Unit (IMU) - situated beneath the front seat support, the IMU consists of a 3-axis
gyroscope and a 3-axis accelerometer, and is used to calculate the motorcycle's lean angle. Data provided by
the IMU is constantly monitored by the optimised cornering traction control system, optimised cornering ABS
and Triumph Semi Active Suspension (TSAS). The IMU also provides fall detection. Power to the ignition and
fuel delivery systems is cut if the IMU detects that the motorcycle is on its side. This prevents the engine from
running and the fuel pump from delivering fuel. In the event of a fall, the fall detection system is reset by
returning the motorcycle to an upright position and switching the ignition off then back on again.
Twist grip position sensors 1 and 2 - the two sensors are located in the same housing which is situated in the
right hand switch cube. The twist grip position sensor is used to relay twist grip position information to the engine
ECM. The engine ECM uses this information to drive the throttle actuator motor to the correct position.
Gear position sensor - situated in the transmission cover, behind the coolant expansion tank. The gear position
sensor provides the engine ECM with selected gear information. This is used to prevent the engine from starting
if the transmission is in gear. The sensor also provides information to the gear position indicator and the neutral
light in the instruments.
Brake switches - incorporated in the ABS hydraulic modulator/ECM. With the cruise control on and active, the
operation of the front or rear brakes will cancel cruise control.
FUEL SYSTEM / ENGINE MANAGEMENT
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